Adjustable pattern.



M. C. ROLL|NS.-

ADJUSTABLE PATTERN.

APPLICATION FILED MAR. 8. I9l6.-

v Patented Aug. 7, 1917.

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ADJUSTABLE PATTERN.

Application filed March 8, 1916.

To all whom it may concern:

Be it known that I, MARSHALL C. ROL- LINS, a citizen of the United States, and a resident of VVatertown, in the county of Middlesex and Commonwealth of Massachusetts, have invented certain new and useful Improvements in Adjustable Patterns, of which the following is a full, clear, and exact specification.

One of the most difficult tasks which a house-builder has to perform is to fit a doorsill or threshold to a doorway, the difficulty being that at each side there are six surfaces to which the corresponding end of the threshold must be fitted; and to mark and cut the latter so that no crevices shall occur is a long and uncertain job.

Another hard operation is to fit the ends of a stair tread between the sides of an inclosed stairway. Another is to cut the ends of a shelf to accurately contact with the surfaces between which it is to be located.

My invention has for its object the construction of an apparatus, or pattern, which can be accurately and readily set to the various surfaces to which a board is to be fitted, and then laid upon the board as a pattern by which the same can be easily marked for sawing.

To render my device both inexpensive and capable of convenient packing with the other tools of a carpenter, I have devised the same so that the parts thereof can in a moment be attached to a stick or board lying about, and thereby dispense with so bulky a member as the latter would be during transportation or storage.

Although I have specifically designed my pattern for use in fitting thresholds, which entails the maximum number of surfaces to be conjointly considered, it is so arranged as to be as readily employed for but a single surface, either at one end alone or both ends of the shelf or other board.

Referring to the drawings forming part of this specification, Figure 1 is a perspective view of the pattern complete, the intermediate portion of the stick employed being shown as broken away. Fig. 2 is a plan view of one end or member of the device, showing in section a door-jamb having the member applied thereto. Fig. 3 is a face view of one of the blades or plates used in the device. Fig. 4 is a face View of another Specification of Letters Patent.

Patented Aug. 7, 1917.

Serial No. 82,952.

of the blades or plates. Fig. 5 is a face view of the third blade or plate. Fig. 6 is a perspcctive View of a portion of the clamping device for fastening one of the patternmembers to an end of the stick. Fig. 7 is a sectional edge View of the heel of the longest blade or plate, showing its connection with the clamping screw,

' The plate or blade 1, which is the longest of the three blades composing each patternmember, is preferably about ten or more inches long, and has at its heel a small square hole 2 designed to receive the squared shoulder 8 of the clamping screw 4. About this hole the metal is raised to enable the flat head 5 of the screw to be wholly flush wlth the under surface of the blade, as shown in Fig. 7. The purpose of the square hole and shoulder is to keep the screw from turning while the thumb-nut 6 is being screwed down.

The blades or plates 7 and 9 are nearly equal 1n dimensions, except that the blade 7 1s somewhat longer and narrower than the other, and each has a longitudinal slot 10 near one longitudinal edge.

The clamping device 11 consists of an elbow having the inner surface of its mem ber 12 formed with spurs l3 and a hole 14. In putting the parts together, the screw 4 is put up through the hole 2, the slots 10 of the blades 7 and 9, and the hole 14, and the thumb-nut 6 turned on the screw. The blade 7 is usually uppermost, and the blade 1 lowermost, but this order is not essential to the operation of the device, except that as the blade 1 is the one formed with the screwreceiving hole 2, it must be below the other parts.

A suitable stick or board 15 of the proper length for the work at hand is then introduced at its ends between the member 12 of each clamping device and the blades, as illustrated in Fig. 1, and the thumb-nuts 6 screwed firmly down until the spurs 13 have been forced into the stick and the vertical member of the device 11 is strongly pressed upon the blades. Thus clamped firmly together, the carpenters pattern is in a condition for use, with the exception that before being thus fastened together, the blades '1 are pressed against the bead-surface 20 of the door jambs (Fig. 2) the blade 7 pressed against the surfaces 21, 22 of each jamb;

and the blades 9 pressed against the surfaces 23, 24 of the amb.

I prefer to thus fasten the members at one side of the door way before adjusting the pattern members at the other side, the fastening being done by the clamping screws and thumb nuts acting on the members 11, as above described.

If the )attern is to be used for a stairway which is uilt in at the sides, and which is termed an inclosed stairway, or if it is to be employed for fitting shelves in between walls at their ends, thenthe blades 1 alone are needed, and the stick 15 should be cut short enough to fit in loosely between the confining walls. Since ,in their adaptation for doorways, the blades or plates 7 9 have their outer edges project beyond the edges of the blade 1, in order to adjust the pattern for the stairways and shelving above referred to, the blades 7 and 9 must have such edges retracted. To do this, all that is needed is to turnsaid blades around sothat the opposite edges, which are considerably nearer the respective slots 10, shall be presented at the outer edges of the blades 1, and, owing to such eccentricity of the slots, said edges are brought within the line of the outer edges of the blades 1.

Then thecarpenter is through with the pattern in one place,,he can loosen-the thumb nuts -6 and throw the stick away, packing the blades away among his tools in a comparatively small compass,the same being not only compact, but inexpensive, easily applied and adjusted, and accurate in its results. To aid in this last named particular,

the blades 1, 7 and 9 are all made as thin as is consistent withdurability, in order to lessen their combined thickness. For were the blades quite thick, the distance from the uppermost blade to the board upon which the parts are laid as a pattern, is made so considerable that a slight variation from a true vertical position on the part of the awl or other scriber will prove a pronounced agent for inaccuracy.

It is, of course,.evident that this pattern, as its name implies, is to be laid upon the board which is to be converted into a tread, shelf or other article, with the stick 15 parallel with a longitudinal edge of the board, and a knife blade, awl or sharp pencil run along the outer edges of each setiof blades, accurately marking the terminal limits of the tread or shelf to becut.

I have found that .when the sticker longitudinally extended member 15isnot applied, the lower end of the clamping elbow 11 slides away from the screw l and the sec tion .12 slipsdown upon ,the screw, .making it somewhat awkward to take hold vof the elbow for raising itup to a point to receive thestick. To obviateethis, I prefer .to place extended member, an elongated blade having a hole near one end, two shorter blades having each a longitudinal slot therein, a screw passing through said hole and slots, a nut on said screw, and a device cooperating with said screw and nut for clamping said blades and member rigidly together.

2. A pattern comprising a longitudinally extended member, an elongated blade having a hole near one end, two shorter blades having each a longitudinal slot therein, a screw passing through said 'hole and slots, a nut cooperating with said screw, and a .member controlled'by saidnut to grip saidelongated member between it and said blades, said controlled member being resiliently supported.

8. A pattern comprising a longitudinally extended member, an elongated blade having a hole near one end, two shorter blades having veach a longitudinal slot therein, a screw passing through said hole and slots, a

thumb nut cooperating with said screw, and I a member having projections and a hole through which said screw passes, whereby said elongatedmember being placed on said blades close beside said screw, the secondnamed .member can have its projections forced by the thumb screw into firm engagement with a surface of the elongated member.

1. A pattern comprising a longitudinally extended member, an elongated blade having a hole near one end, two shorter blades having each a longitudinal slot therein, a screw passing through said hole and slots, a thumb-nut cooperating with said screw, and a member having a hole through which said screw passes, said member having one part supported from said blades, its .opposi-te part being adapted to be pressed by the thumb-nut upon the upper surface of the elongated member.

5. A pattern comprising a longitudinally extendedimember, having at each end a plurality of bladesand aclamping means for rigidly fastening said 'blades to each end, the clamping means embracing ineach case a screw and thumb nut, one of the blades at each end being elongated and the others being shorter, the lower-most of the blades having a hole for the screw and the others having each a slot receiving the screw, and a clamping device for each end consisting of an elbow the horizontal member of which is penetrated by said screw and pressed upon the elongated member by the thumb-nut, and the vertical member of which presses against the upper most of said blades.

6. A pattern comprising a blade, a screw connected therewith, an elbow having a hole in one member through which the screw projccts, a thumb nut on said screw, a stick designed to be clamped to said blade by said elbow and nut, and a helical spring on said screw between said blade and hole for hold- 10 ing the elbow raised when said stick is not engaged thereby.

In testimony that I claim the foregoing invention, I have hereunto set my hand this 7th day of March, 1916.

MARSHALL G. ROLLINS.

Witness:

A. BLEPHAM.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

